Entry Dates: September 21, 2015 and ends at 3:45 pm ET on September 24, 2015. The live signing will take place from 2:30 to 4:00 pm ET on Thursday, September 24, 2015.

Twitter Entry: Submit a Tweet to @XFINITY using the hashtag #SignMyTweet to be eligible for a chance to win an autographed copy of the printed tweet signed by Neil Patrick Harris. Entry tweets cannot contain any third-party names, logos, trademarks or other proprietary property, nor any profanity or other offensive language in the sole judgment of the Sponsor; any such tweets will be disqualified.

Potential Winners will be notified by a Direct Message Tweet immediately after selection and asked for an address to which to send the autographed printed Tweet and to affirm they conform with and agree to all of the Official Rules. Only those Potential Winners who respond to the Direct Message within the allotted time mentioned in the Direct Message will be able to claim his/her prize and become an official winner.

Entry Limit: one tweet/entry per person

Up to Five Hundred (500) Prizes: A 10″ x 60″ hard copy of entrant’s Tweet signed by Neil Patrick Harris, along with a letter of authenticity. ARV: $1.00